Seal-lock



0. 0. PRATT.

(No Model.)

SEAL LOGK.

No. 384,542. PatemdJime 12, 1888.

W ITNEssEs: INVENTOR UNITED STATES PATENT Urrrcn.

OSCAR C. PRATT, OFSAN RAFAEL, CALIFORNIA.

SEAL-LOCK.

SPECIFICATION forming part of Letters Patent No. 384,542 dated June 12, 1888.

Application filed September 6, 1887. Serial No. 248,951. (No model.)

To all whom it may concern:

Be it known that I, OSCAR O. PRATT, of San Rafael, in the county of Marin and State of California, have invented a new and useful Improvement in Seal-Locks, which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure I is a front view of an open seal-lock; Fig. II, a front view of the look when closed with the seal in position, and Fig. III a top view of the same.

The object of my invention is to provide an improved seal-lock which is simple, inexpensive, and reliable. This seal can be readily adapted, if desired, to the car-locks in ordi nary use or applied to such as are constructed for the purpose. A lock provided with this seal cannot be opened by a key without first.

destroying the seal, and not otherwise, except by mutilating some part of the lock. The seal is so disposed as to cover the key-hole, and issecured in its proper position by the action of closing the look. If the seal should be broken, a duplicate cannot be substituted without first opening the look. A double security is thus provided, as it will be obvious that 'not only a key but a duplicate seal would be required to enable a thief or other unauthorized person to open a car-door without leaving evidence of such action.

The device consists of a plate of glass, earthenware, or other suitable material, which may be stamped with letters, figures, or other characters to indicate the road to which the car belongs or the station to which it may be conand the lockplate proper.

signed. This plate is fitted to grooved jaws, which are attached to the outside front of the lock-plate, and is so shaped that it readily finds its appropriate place, and is secured therein by a lever, which in turn is secured in place by a spur on the shackle of the look when the same is closed.

Referring to the accompanying drawings, A designates a car-lock of the usual form; B, the seal to be inserted in the grooved jaws O C. These jaws may be integral with the lock-plate or made separately and riveted thereto. D is the shackle, having the bent spur F at its heel; E, a locking arm or lever, one end of which is pivoted between one of the grooved jaws C When the seal is in place, this lever is thrown over it, as in Fig. 2, and locked by the spur F on the shackle D.

What I claim as new is-- The within-described seal-lock A, having secured on one side the grooved jaws O, the seal B, fitting in the said jaws, the lockinglever E, pivoted between one of the grooved jaws and the lockplate proper, and the shackle D, having near its heel the spur F, all combined in the manner and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand, this 5th day of August, 1887, in the presence of witnesses. OSCAR O. PRATT. Witnesses:

ARTHUR ADAMS, H. G. PRESCOTT. 

